Question

In case of a fire, before the firemen use the water hoses, they shut off the main electrical supply for the area. Explain why they do this

Answer 1

First let us see what electric drowning is-
A term used in the United States to describe a manner of death that happens when divers are exposed to electric waves in the water is electric shock drowning. In water, which is conductive due the dissolved minerals or impurities, electric shock drowning occurs more commonly.

Complete step by step answer:
Electricity is the collection of physical phenomena correlated with an electric charge property of the presence or motion of matter. As defined by Maxwell's equations, electricity is linked to magnetism, being both components of the electromagnetic phenomena. Electricity is the movement or charge of electrical power.

If the region's electrical service is not shut down and water is spilled over electrical equipment, so water will flow through electricity and damage the firemen. It's why, in the event of a fire, before the water hoses are used, the firemen cut off the key electrical supply also for the city.

Water is a good electrical conductor. Therefore, if the area's energy source is not shut down and water is poured over electrical equipment, energy will flow via the water and damage the firemen. Therefore, in the event of a fire, until the water hoses are used, the firemen cut off the key electrical supply for town.
Hence, In case of a fire, before the firemen use the water hoses, they shut off the main electrical supply for the area mostly to avoid shock.

Note:
In stopping the short circuit, and anytime the water comes into power contact, there would be a short circuit throughout the house such that they turn from the main electrical source to prevent this.